Three-term Congresswoman and a former Arizona State Representative Sinema, who’s bisexual, is aiming to win the seat of outgoing Senator Jeff Flake (R). In the state’s Aug. 28 Democratic primary, she coasted with 80% support. Her Republican rival, Congresswoman McSally, won with 53% of the vote. As of June 30, Sinema ($9.5 million) had more than twice as much campaign donations as McSally ($4.2 million). The race is considered a toss-up.

One-term Congresswoman Rosen is challenging Senator Heller, who’s the incumbent. In the state’s June 12 primary, both candidates won by more than 70% margins. As of June 30, both campaigns had raised in excess of $8 million. While this is viewed as a seat the Democrats can win, the race is considered a toss-up.